Refrigerating apparatus.



C. C. HANSEN.

REFRGERATING APPARATUS.

APPLICATIQN FILED ,18.23, 1916.

Pauted Mar. l2, li

3 SHEETS--SHEET C. C. HANSEN.

REFRIGERATING APPARATUS.

APPLICATION FILED FEB. 23. I9Is.

.259,014. @amm Maf. I2, 1918.

UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN, OF FOR-EST FARE, LLENOS, ASSGNOR TO REFRIGERATOB SPECIALTIES COMPANY, OF CHICAGO, ILLXNIS, .A CORPRATON OF ILLINOIS.

Application led February 1916.

T0 all ywhom t may Concern.'

Be it known that L Ciinrzrns C. Hansen, a citizen of the United c tes, and a resident of Forest Fark, in the county or Cook and State oi lllinois, have invented certain new and useful lmproi/ements in Refrigeratinpg Apparatus, of which the 'following is a full, clear, and exact description.

The invention relates to reirigeratiig apparatus and more particularly to mechanism for automatically controlling)` the operation of the system responsiifely to variations in temperature in the room or compartment to be refrigerated.

lu automatic reirige 'ating systems, in which a cooling` liquid for the refrigerant condenser or the compressor is used, it has been found that the operation or the refrigerant compressor, when the supply of cooling liquid is insuiiicient or fails7 is destructive to the apparatus. One object oi' the present invention to provide improved controlli ng mechanism for the apparatus? controlled by the supply of cooling water, and in which provision is made for automatically setting the starting mechanism in position to become opera". i automatically to jiefstart the compre r when the supply of cooling-liquid is restored.

further object ofi the invention is to provide improved controll i' mechanism `tor automatic refrigerating sy ems The invention consists iii the several novel features hereinafter set forth and more particularly deiined by cla at the conclusion hereof.

in the drawings: Figure iis a vertical "section otl thel improved controlling mechaism, parts being shown in elet/'ation Fig. .is a section taken on line 2--2 of l. ,.ig. 3 is a section taken on line 3 3 of Fig. Fig. 4f is a horizontal section taken on line we oiE Fig. Fig. 5 is a vertical section showing the connection between the stem of the water-valve operated by the motor and its connection for operating' the switch-lever for controlling the restarting mechanism. Fig. 6 is a detail section through the cams on the shaft operated by the starting-motor, for operating 'the water-valve and the switch for controlling the operation of the compressor-motor, respectively. Fig. 7 is a detail of the cam Yfor operating the switch for controlling the motor which opcrates the compressor. Fi 8 is a detail of Specification of Letters Patent.

Patented Mar. 12, 1918.

Serial No. 79,814.

the cam Ytor operating the water-\f'alve. Fig.

9 is a diagram of a refrigerating apparatus and the improved controlling mechanism,

the parts beingl shown in normal position. f. is a. diagram of the circuit-controller in position assumed between the starting and stopping cycles of the starting-motor. ll is a View of the circuitcontroller in position assumed when the water supply in the condenser fails and after the controller has been operated by the starting'- inotor to cause the compressor and motor to restart upon the restoration et the watersupply.

Referring to the diagram (Fig. 9) o denotes a pump or compressor for the refrigerant; F), a refrigerant-line suitably connected to the pump; c, a condenser-coil in a tank ci; c, a receiver 'for the refrigerant; 1T, a motor 'lor drivinp; the compressor; and 16 a pipe which supplies cooling` water to the refrigerating system and is connected to the tank al.

.lotor l? is connected to be supplied with i 'trom a pair o' line-conductors 18 and n switch comprising contacts 2O and 2l and a lever 2Q is included in a conductor 19h which connects one brush of the motor to line-conductor 19, rEhe other brush of this motor connected to line-conductor 1S by a brauch-conductor 181.

i starting' motor is employed to operate a valve for controlling the water supply to the coiulenser7 the switch-lever 22 for controlling` the operation of the motor 17, and a circuit controller 30, and is suitably mounted upon a bracket Se which is adapted to be secured to some suitable, convenientv support of the system. A hood incloses said motor and its associated parts. Controller 30 is secured to shaft ill, which is driven by motor 23 through a geartrain comprisinga worm 3S on the motor-shaft and meshing; with a gear 37 on an upright shaft` 38. a ivorm 39 on shaft 3S and meshing with a suitable gear l() iixed to'the sliai't el. Shaft 4l is mounted in bearings and 46.

A cam To on shaft 41 operates a vertical slide 73 carrying a roller 73a. The lower end oi? this slide bears against a lever 74 which is pivoted, as at 75, to support 58. This lever is pressed upwardly by a spring SG held in a slotted. housing S0a and has its distal, end pivotally connected to an arm ment in and insulated from support i3. il spring-pressed shifter 97, carrying a roller adapted to be operated by the controller 30, is also slidably mounted En support and its outer end is adapted to operate e resilient 'ement switch 96, which is normally in with the outer end of eo; 97 is insulated from member r, 30 is provided with a notch out either of the contacts operating c and with a cam 31 for operating the shifter 97.

The starting motor 23 is included in a conductor 27 which connected to the lineconductor 13 and to contacts 100 and 101. A conductor 97 dit la connects Contact 102 and a thermostat-contact 29. con* .ct 32 is connected to said conductor. il conductor 99 connects switch-member 96 and contact 99. Contact 33 is connected to the thermostat 2e by a conductor 3. Contact 91; nected by a conductor to the lino-conducn tor 19 and to the therinostat-contact 20.

A fuse 19fl (Figs. 1 and 9) is included in conductor 19b which extends from line-conductor 19 to the switch contact 20 A switch consisting of an arm 92 and an armate-contact 91 is included in a conductor 99 which is connected to conductor 19b so to cut out the fuse. Switch-arm 92 is perated by member 922L on shaft 11 which is operated by the starting-motor 23. lllhen this switch is closed, the fuse will be short-circuited and current will be directly supplied to the inotor 17. This cut-out switch is a-'lapted to cause this to occur during the inital operation of motor 17 or for a perioc of sufiicient length to enable the motor to start the coinpressor before the fuse 19 is cut into the circuit. During the remainder each operation, said switch will be open to render the fuse operative. This device eriemwr ilfies a fuse cut-out for the compressor motor which is controlled and operated by the starting motor.

When the compressor is at rest, the controlling mechanism will be in the position shown in Figs. 1 and 9. lNhen the teinperature of the refrigerating room or space rises sufficiently to require operation of the system, the thermostat 24 will move against contact 20, whereupon a circuit for the operation of motor 23 will be established as follows: line-conductor 18, conductor 27, in which motor 23 is included, co 101, lever 103, conta t 102, conducto intact 32, controll r 30, contact con@ A' r thermostat 24, contact conductor and line-conductor 19. rlhis circuit will cause the motor 23 to operate shaft /1-1 a vcle of one-half revolution or until the co tfollcr 39 has been rotated a one-half o itionq at which time this circuit will be terrupted troll/er 30. the miti al between contact 32 and the coi as shown in Fig. 10. Durin portion of this cycle of shaft 4:1, the watervalve 52 will be opened by cam 57. If the water pressure is suiiicient, plunger 60 will operate stem 09 and abutment 7 2 to hold switch 103 in its normal position across contacts 101 and 102, after stop 1111: releases lever 112 Toward the end of this cycle, switch-lever 22 will be shifted by cani 70 to close a circuit for motor 17 for driving the compressor, as follows: line-conductor 1S, conductor 18a, motor 17, conductor 19", switch-contact 21, lever 22, contact 20, conductor 90 in which the switch 91, 92, is included, and conductors 19h, 19. Initially, and during a sufficient period for the motor 17 to start the load, this circuit, through switch 91, 92 will continue, but before the circuit for the motor 23 is interrupted at the end of a starting cycle, lever 92 will be opened by its connection 92a with shaft il1 to cut in the fuse 19a, and cause the current from contact to pass to line-conductor 19 through said fuse. This permits the motor to start the compressor before the fuse is out into the circuit.

When the motor 17 has been operated for :i suflicient period to reduce the temperature in the refrigerating rooin to the predetermined minimum, thermostat 24 will engage contact 28, whereupon a circuit for operating the motor 23 and shaft l1 for a stopping cycle, will be established as follows: lineconductor 18, conductor 27, in which motor 23 is included, contact 101, lever 103, contact 102, conductor 27, thermostat-contact 28, thermostat 2li, conductor 33, contact controller 30, contact 911, conductor 25 and line-conductor 19. This circuit will remain until shaft 41 and controller 30 have been operated a half-revolution and the notch in the controller is adjacent the contact 91 when the last mentioned circuit will be interrupted. During this stopping cycle, cani 7 6 will be operated initially to permit switch-lever to be opened by spring S0, and during the latter portion of this cycle, cam 57 will permit the water-valve to be closed by its spring 53. During the latter portion of this cycle, switch 90, 91 will pass into closed position to short-circuit the fuse 19. rit the conclusion of this stopping cycle, controller will break the circuit at contact 32, and the mechanism will be restored to normal position.

When valve 52 has been opened and stop 111 is lowered to release lever 112, which operate plunger 60 to cause abutment 72 to hold levers 105 and 193 in said position, spring 1041` will shift lever 103 into posi- 'tion to bridge across contacts 99, 100, and, `hereuponv` a circuit for motor 23 will be established as follows: line conductor 18,

conductor 2" in waich motor 23 is included, contact 100, lever 103, contact 99, conductor 9S, spring-contact 9S, contact 94, conductor and line-conductor 19. This circuit will cause the starting motor to be operated independently of the thermostatic contacts 2G, 28, and will remain closed until the controller has moved the iull starting cycle and a portion of the stopping cycle oi shaft ill, that is, until cam 31 on controller 30 has been rotated into contact with the shifter 97, whereupon, the last mentioned circuit will be interrupted at contacts 941, 96, causing the motor 23 to stop with the controller in position shown in 11. During this operation, the switch-lever will be closed and again opened, and the watervalve 52 will be opened and held open. The controlling mechanism will remain set in this position until the water operates the plunger 60, wl ereupon it will automatically start the motor 23 and complete the stopping cycle ot shaft e1 and immediately cause its operation through the starting cycle to restart the motor 17. When plungerl shifts lever 103 into position shown in Fig. 9, as the result of the restoration of water-pressure, said lever will establish a circuit through motor 23.

The circuit will then be as follows: conductors 1S, 27, contact 101, lever 103, contact 102, conductor 2T, contact 32, controller 30, contact 94 and conductors 25 and 19, until the controller concludes the normal stopping cycle 10). lin lieu of stopping at the end of this cycle, the motor 23 will continue to operate because the thermostat-ic circuit through contact will be closed, until a normal starting cycle has been completed (Fig. 10).

The controlling mechanism set forth ex empliiies one in which the switch for the compressor-motor, operated by the starting motor and in which the water-supply for the condenser controls circuit connections ttor the starting motor, to automatically stop and restart the compressor-motor, and in which provision is made for automatically rendering said motor operative as soon as there is suiiiciency of water supply.

rlhe invention is not to be understood as restricted to the details setiorth, since these may be vnodiiied within the scope of the appended claims, without departing from the spirit and scope of the invention.

Having thus described the invention, what l claim as new and desire to secure by Letters Patent, is:

1. in a retrigerating system, the combination of a compressor, motor for operating the compressor, a switch -for controlling said motor, a starting motor, an operative connection between the starting motor and said switch, means for supplying cooling liquid, and means controlled by the nessure of the cooling liquid for controlling` the operation of the startingmotor.

2. in a rerigerating system, the combination of a compressor, a motor for operating the compressor, a spring-closed switch for controlling said motor, a starting motor, an operative connection between the starting motor and said switch, means for supplying cooling` liquid to the system, and means controlled by the pressure of the cooling liquid for controlling` the operation of the starting motor.

in a retrigerating system, the combination o" a compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, an operative connection between the starting motor and said switch, comprising a cam and a lever, ieans for supplying cooling liquid to the system, and means controlled by the pressure of the cooling liquid for controlling the operation oi the starting motor operate said connection to open the switch.

4r. ln a reirigcrating system, the combination of a compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, a shaft driven by the starting motor, an operative connection between said shaft and said switch, means for supplying cooling liquid to the system, and means controlled by the pressure of the cooling liquid 'for controlling the operation of the starting motor.

5. ln a refrigerating system, the combination ott a compressor, a motor for operating the compressor, a switch for controllingsaid motor, a starting motor, an operative connection between the starting motor and said switch, means for supplying` cooling` liquid to the system, and means controlled by the pressure of the cooling liquid for controlling the operation of the starting motor to ogei7` ate said connection to close and open the switch responsively to a deficiency in the supply of cooling liquid.

0. In a refrigerating system, the combinaion of compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, an operative conncction between the starting motor and said switch, means for supplying cooling liquid to the system, and thermostatic and pressure-controlled means for controlling the operation ot' the starting motor to operate said connection to close and open the switch.

7. In a refrigerating system, the combination of a compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, a shaft driven by the starting motor, an operative connection between said shaft and said switch, means for supplying cooling liquid to the system, and means controlled by the pressure of the cooling liquid, for controlling the operation of the startingniotor to operate said connection to close the switch.

8. In a refrigerating system, the combination of a compressor, a motor for operating the compressor, a spring-closed switch for controlling said motor, a starting motor, an operative connection between the starting motor and said switch for opening the switch, means for supplying cooling liquid to the system, and means controlled by the pressure of the cooling liquid, for controlling the operation of the starting motor to operate said connection to close and open the switch.

9. In a refrigerating system, the combination of a compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, an operative connection between the starting motor and said switch, thermostatic means for controlling the operation of the starting motor, means for supplying cooling liquid to the system, and means controlled by the pressure of the cooling liquid, for controlling the operation of the starting motor, to operate said connection to open and close the switch.

l0. In a refrigerating system, the combination of ,a compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, an operative connection between the starting motor and said switch, thermostatic means for controlling the operation of the starting motor, means for supplying cooling liquid to the system, a valve for the liquid, operated by the starting motor, and means controlled by the pressure of the cooling liquid, for controlling the operation of the starting motor to operate said connection to open and close the switch.

11. In a refrigerating system, the combination of a compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, an operative connection between the starting motor and said switch, means for supplying cooling liquid to the system, and means controlled by the pressure of the cooling liquid, for controlling the operation of the starting motor to operate said connection to open the switch responsively to a deficiency in the liquid supply and to automatically close the switch upon restoration of the pressure.

12. In a refrigerating system, the combination of a compressor, a motor for operating the compressor, a switch for controlling said motor, a starting motor, an operative connection between the starting motor and said switch, thermostatic means for controlling the starting motor, means for supplying cooling liquid to the system, and means controlled by the pressure of the cooling liquid, for controlling the operation of the starting motor to operate said connection to open the switch when the liquid supply is delicient and to automatically close the switch upon restoration ot' the pressure.

it. In a refrigerating system, the combi- `ation of a compressor, a motor for operatngV the compressor, a switch ifor controlling aid motor, a starting motor, an operative connection between the starting motor and the switch, a valve for controlling the supply ci cooling liquid to the system, a connection for operating said valve operated by the starting motor, automatic means for controlling the operation of the starting motor, and means controlled by the pressure of the cooling liquid ior controlling the operation of the starting motor. s

In a reirige 'ating system, the o0mbination oi"- a compressor, a motor for operating the compressor, a switch for controle ling said motor, a starting motor, an operative connection between the starting motor and the switch, a valve for controlling the supply ol cooling liquid to the system, a connection for operating said valve, operated by the starting motor, means for controlling the operation oi' the starting motor for starting and stopping cycles and means controlled by the pressure of the cooling liquid for controlling the operation of the starting motor to open and close said switch.

15. In a refrigerating system, the combination ot a compressor, a motor lor operating the compressor, a switch for controlling said motor, a starting motor, an operative connection between the startinfY motor and the switch, a valve for controlling the supply of cooling liquid to the system, a connection for operating said valve, operated by the starting motor, means for controlling the operation oi the starting motor for starting and stopping, and means controlled by the pressure ot' the cooling liquid for controlling the operation or" the starting motor to open said switch when the liquid-supply is deficient and to automatically close the switch upon restoration oi pressure.

16. In a retrigerating system, the combination of a compressor, a motor tor operating the compressor, a switch for controlling said motor, a starting motor, a shaft driven by said starting motor, an operative connection between the shaft and the switch comprising a cam, a valve ior controlling the supply of cooling liquid to the system, a cam on said shaft for operating said valve, then inostatic means for controlling the operation of the starting motor, and means controlled by the pressure of the cooling liquid for controlling` the operation of the starting motor.

17. In a ieti'igerating system, the combitor, an operative Connection between the startino' motor and said switch, a controller operated by the Starting motor, controllingnieans for the starting motor connected to said controller, and comprising a switch connected to said controller and pressurecontrolled means for operating the latter switch.

18. ln a retrigerating system, the combination of a compressor, a motor tor operating the compressor, a switch for controlling the operation of said motor, a starting motor, an operative connection between the starting motor and said switch, a controller operated by the starting n'iotor, thermostatic controlling means for the starting motor, connected to said controller, said means comprising a switch connected to the controller, and pressure-controlled means for operating the latter switch.

19. in a refrigerating system, the combination of a compressor, a motor :tor operating the compressor, a switch for controlling the operation of said motor, a starting niotor, an operative connection between the starting motor and said switch, a controller operated by the starting motor, thermostatic controlling means connected to said controller, said means comprising a switch connected to said controller, a Valve operated by the starting motor, for supplying liquid to the system, and controlling means for the latter switch conjointly controlled by the valve and the pressure of liquid.

20. in a retrigerating system, the combination of a compressor, a motor toi' operating the compressor, a switch for controlling the operation of said motor, a starting motor, a shatt ooerated by the starting motor, an operatire connection between said shaft and said switch, a controller on said shaft, elect'cal connections for said controller, for controlling the operation of the starting motor, a cam on the controller, a switch operated by said cani, a circuit connected to said latter switch, a switch in said circuit, and pressure-controlled means for operating said last mentioned switch.

2l. ln a retrigerating system, the combination of a compressor, a motor for operating the compressor, a switch for controlling the operation of said motor, a starting inotor, a shai't operated by the starting motor, means on the shaft for operating said switch, a valve for controlling tie supply of cooling liquid, means on said shaft for operating said valve, a circuit controller, means tor controlling the operation of the starting motor comprising a switch, means for operating said latter switch conjointly controlled by said valve and the pressure of liquidl` a thermostat, and electrical connections between the controller and the thermostat.

22. lin a retrigerating'system, the combination of a compressor, a motor for operating the compressor, a s p`ring-close l switch for controlling the operation of said motor, a starting motor, a` shaft operated by the starting motor, a cam on the shaft tor operating said switch, a valve for controlling the supply oiI cooling liquid, means on said shaft for operating said valve, a circuit controller, means for controlling` the operation ot' the starting motor comprising a switch, means for operating said latter switch, conjointly controlled by said valve and the pressure of liquid, a thermostat, and electrical connections between the controller and the thermostat.

a retrigerating system, the combination oi' a compressor, a motor tor operating the compressor, a switch for controlling the operation of said motor, a starting motor, a shai't operated by the starting motor, means on the shaft tor operating said switch, a valve for controlling the supply of cooling liquid, means on said shaft for operating said Valve, a controller, controlling ni'eans for the starting motor comprising a pair ot' switches, means for operating one ol said latter switches, conjointly controlled by said Valve and the pressure of liquid, means on the controller for operating the other of said pair ot switches, a thermostat, and electrical connections between the controller and the thermostat.

in a retrigerating system, the combination of a compressor, a motor tor operath ing the compressor, a switch for controlling the operation ot said motor, a starting motor, a shaft operated by the starting motor, means on the shaft for operating said switch, a valve for controlling the supply of cooling liquid, means on said .sh-att ior operating said Valve, a controller, controlling means for the starting motor comprisingl a switch, a plunger operated by pressure ot the liquid, connections for operating said latter switch, operable by said valve and the plunger, a thermostat and electrical connections between the controller and the thermostat.

25. in a refrigerating system, the combination of a compressor, a motor for operating the compressor, a switch for controlling the operation oit said motor, a starting motor, a shaft .operated by the starting motor, means on the shaft for operating said switch, a valve for controlling the supply of cooling liquid, means on said shaft ior operating` said ralre, a circuit-controller operated by said shaft and means :tor controlling the starting motor comprising a switch operated by the controller and a switch conjointly controlled by said yal've and the pressure ot said liquid.

2G. in a refrigerating system, the combination 01' a compressor, a motor for operating they compressor, a switch for controlling the operation of said motor, a starting motor,

llo

@rated by the controller and a switch operable by said valve and the pl'essue of said liquid, a thermostat and eeclcal c011- ections beween 'the ccntloller and the hemostai.

a shaft operated by the starting motor, means 011 the shaft for operating said swch, a Valve for controlling he supply cooling liquid, means 011 said shaft for opeang said Valve, a circuit controller, on said shaft, and means for controlling the ops'aan o the starting motor comprising a switch op CHARLES C. HANSEN.

Copies o! this patent may be obtained for ve cents each, by addressing the Commissioner of aizencs1 Washington, D. C. 

